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<br>This is a Pyrolectric sensor(PIR) module which produced for human body detection.Its is additionally called Motion Sensor.A PIR detector joined with a Fresnel lens are mounted on a conservative size PCB together with a simple IC , and constrained segments to shape the module. It recognize the movement by identifying the adjustments in the IR levels radiated from the item.<br>https://www.robomart.com/buy-pir-motion-detection-sensor-arduino-raspberry-pi<br>
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Pir Motion Detection Sensor By ROBOMART.com
PIR Motion Sensor In order for a PIR sensorto work all of the time, they are designed some certain limitations. A PIR sensor cannot detect a stationary or very slowly moving body - if the sensor was set to the required sensitivity, it would be activated by the cooling of a nearby wall in the evening, or by very small animals. Similarly, if someone walks straight towards a PIR sensor, it will not detect them until they are very close by. PIR sensors are temperature sensitive- they work optimally at ambient air temperatures of around 15-20 degrees Celsius. If the temperature is over 30 degrees, the field of view narrows and the sensor will be less sensitive. Alternatively, if the temperature is below 15 degrees, the field of view widens and smaller or more distant objects will activate the sensor ROBOMART.com
OCCUPANCY SENSORS / ENERGY SAVING SENSORS When occupancy in a given space is predictable, switching can often be scheduled using simple devices such as time-clocks and timer-switches to save energy. When occupancy is not predictable, then switching can be automated using occupancy sensors. Occupancy sensors detect when a space is occupied or unoccupied and turn the lights on or off automatically after a short period of time to save energy. Energy Savings: Depending on the characteristics of the space to be controlled, energy savings as high as 90% can be realized through use of occupancy sensors. ROBOMART.com
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